The Effect of Mandibular Position on Upper Airway Dimensions

The aim of this study is to evaluate the upper airway morphology in individuals having different anteroposterior jaw relationship. The linear, angular and area measurements were performed on the lateral cephalometric films taken from 24 individuals with Class I skeletal relationship, 21 individuals having Class II skeletal relationship due to mandibular retrog-nathia and 25 individuals with Class II-I skeletal relationship due to mandibular prognathia. Comparison of the values between groups was evaluated by Analysis of variance (ANOVA). Nasopharyngeal and hypopharyngeal measurements were significantly different among Class II and Class III groups. Hyoid bone was positioned upper and backward in Class II subjects whereas it was positioned lower and more forward in Class II-I subjects. It was concluded that upper airway space is affected from the anteroposterior skeletal relationship. In addition, the nasopharyngeal and hypopharyngeal areas are significantly narrower in mandibular retrognathic individuals (p<0.001), whereas these areas are wider in Class III individuals compared to the other two groups. Uvula length and uvula angulation values are significantly higher in Class III subjects compared to Class I and Class II individuals (p<0.001). According to these findings, upper airway dimensions are affected by the skeletal pattern

Myofunctional Treatment of Anterior Openbite With Preorthodontic Trainer: Report of a Case

This case report describes the treatment of a 11,2 year-old girl presenting an anterior openbite due to abnormal swallowing habits, tongue thrust and mouth breathing, treated with Preorthodontic TrainerTM (T4KTM Myofunctional Research Co. Helensvale, Australia) appliance. The patient had a skeletal Class I relationship with a 3mm of openbite and 2mm of overjet as well as a normal profile. The molar and canine relationships were Class I. The patient used the preorthodontic trainer for 8 months to eliminate the mouth breathing and stimulate nose breathing, eliminate the tongue thrust and close the bite. The patient was instructed to use the second phase appliance of preorthodontic trainer for retention during the 1-year period. At the end of the treatment the openbite was eliminated as well as the tongue thrust habit. The Class I relationship was maintained and a stable dentofacial relationship was established. At the follow up period the overbite increased and the treatment results were maintained

Lower Incisor Inclination in Relation to Head Posture, Tongue and Hyoid Positions

Objectives: To investigate the relationship between head posture, hyoid bone, tongue position and lower incisor inclination. Materials and Methods: The study sample consisted of 98 subjects (35 males, 63 females), who had a mean age of 17.7 years in the permanent dentition and with a skeletal Class I relationship. Lower incisor inclination, craniovertical, craniocervical and craniohorizontal postural variables, tongue and hyoid position and airway measurements were evaluated on lateral cephalograms taken in natural head position. The study sample was divided into two groups according to lower incisor inclination (48 had IMPA&lt;90 ⁰ with a mean degree of 88.09 and 50 had IMPA&gt;90 ⁰ with a mean degree of 102.84) and a Student-t test was performed to compare and describe head posture, tongue and hyoid bone positions.Results: The subjects with upright incisors had a more posteriorly positioned hyoid bone relative to the mandibular symphysis compared with the subjects with flared incisors (p&lt;0.05). Tongue length was greater in the flared incisor group than in the upright incisor group (p&lt;0.05). In relation to head posture measurements, the upright incisor group had 3-3.5° larger cranio-cervical angles (NSL-OPT, NSL-CVT, NL-OPT, NL-CVT angles, p&lt;0.05) than the flared incisor group. The airway measurements revealed no statistically significant difference between the groups.Conclusions: The position of the hyoid bone, tongue length and craniocervical head posture showed significant differences between upright and flared lower incisors

Üst çene orta hat diastemasında essix apareyinin kullanımı: olgu sunumu

Üst çene orta hat diasteması özellikle estetiksorun yaratması nedeniyle tedavi edilmesi gerekenönemli bir problemdir. Üst çene orta hat diastemasıdiş eksiklikleri, yüksek frenilum ataçmanları, ortahattaki bir patoloji gibi pek çok nedenle karşımızaçıkabilir. Tedavi yaklaşımları da çok çeşitli olabilenüst çene orta hat diastemasının etkin tedaviyaklaşımlarından biri de essix apareyi ile tedavidir.Essix apareyi kullanımının kolay, pratik olmalasıve ekonomik olması nedeniyle tercih edilir. Bu vakasunumunda maksiller orta hatta 4 mm diasteması olan S›n›f I iskeletsel özelliklere sahip 15 yaş›nda k›z hastan›n tedavi yaklaş›m› gösterilmiştir. Molar ve kanin ilişkisi s›n›f I olan hastan›n maksiller orta hat diastemas›n› kapatmak için essix apareyi kullan›lmşt›r. Yaklaş›k 2,5 ay süren tedavi sonunda üst çene orta hat diastemas›n›n tamamen kapand›ğ› görülmüş, estetik sorunun ortadan kalkt›ğ› belirlenmiştir

Effect of Acidulated Phosphate Fluoride and Casein Phosphopeptide-Amorphous Calcium Phosphate Application on Shear Bond Strength of Orthodontic Brackets

Objective: To evaluate the effect of a recently introduced prophylactic agent, casein phospho-peptide-amorphous calcium phosphate (CPP-ACP), on shear bond strength of brackets and compare it with the effect of acidulated phosphate fluoride (APF). Materials and Methods: Forty-eight freshly extracted mandibular bovine incisors were used. Teeth were randomly divided into four groups (n = 12) as follows: group 1 served as control, and no pretreatment was performed on the enamel; group 2, enamel was treated with 1.23% APF and CPP-ACIP, respectively; group 3, enamel was treated with CPP-ACP; and group 4, enamel was treated with 1.23% APF for 4 minutes. In all groups, brackets were bonded using a conventional acid-etch and bond system (Transbond XT, 3M Unitek, Monrovia, Calif). Bonded specimens were first stored in deionized water at 37 degrees C for 24 hours, subjected to thermal cycling for 1000 cycles, and further stored in distilled water for 6 weeks before debonding procedures. After debonding, teeth and brackets were examined under a stereomicroscope at 10x magnification for any adhesive remaining, in accordance with the modified adhesive remnant index. Results: The shear bond strengths of all experimental groups were significantly higher than that of the control group (P .05). Conclusion: The use of CPP-ACP either alone or combined with APF could be considered as an alternative prophylactic application in orthodontic practice since it did not compromise bracket bond strength.WoSScopu

Oral Health İn Cleft Lip And Alveolus

Cleft lip and palate is one of the most common congenital deformities. Patients who have clefts of the lip and palate often need complex and extensive treatment, usually provided by an interdisciplinary team of pediatrists, orthodontists, plastic surgeons, pediatric dentists, maxillofacial surgeons, speech therapists, and others. In this paper, dental anomailes that usually occur in the children with cleft lip and palate will be discussed as well as the increased caries incidence and need for preventive programs in the same population